High-frequency heating coil for metal workpieces



FIG. 1 is a plane view of the article.

FIG. 2 is a rear view of the article.

FIG. 3 is a plane view of the article.

FIG. 4 is a bottom and view of the article.

FIG. 5 is a left side view of the article.

FIG. 6 is a right side view of the article.

FIG. 7 is a sectional view taken on line A—A in FIG. 3.

FIG. 8 is a perspective view of the article; and,

FIG. 9 is a perspective view of the article in use.

As shown in FIG. 9, the article is a high-frequency heating coil for heating a 2-tier metal workpiece at high frequency. 

The ornamental design for a high-frequency heating coil for metal workpieces, substantially as shown and described. 